Boring-tool.



No. 730,709. v

PATENTED J-UNE 9, 1903.. o. K. SHEETS E W. L. HILL.

BORING TOOL.

APPLIOATION FILED EEB. 2a, 190s.

N0 MODEL.

UNITED STATES Patented June 9, 19073.

PATENT OFFICE..v

CHARLES K. SHEETS AND WILLIAM L. HILL, OF MONTGOMERY CITY, MISSOURI.

somNc-Tool...

SPECIFICATION forming part of Letters Patent No. 730,709, dated June v9, 1903. Application filed February 26, 1903. Serial No. 145,271. (No model.)

To @ZZ whom, it may concern;

Be it known that we, CHARLES K. SHEETS and WILLIAM L. HILL, citizens of the United.

provements in Boring-Tools, of which the fol-v lowing is a specification.

This invention relates to boring-tools, more definitely stated tools specially adapted forboring bung-holes.

The invention consists of anew and im-y proved tool of that character which will be hereinafter fully described, and thenovel fea tures pointed out in the claims.

In order to enable others to make and use'Y our invention, we will now proceed to describe it in detail with reference to the accompanying drawings, forming a part of this specification. l

Figure l is a perspective view illustrating our invention. Fig. 2 is a detail sectional view on line X X, Fig. l. Fig. 3 is a similar view on line y y, Fig. 2. Fig. 4: is a detail perspective view of one of the cutter-blades. Fig. 5 is a horizontal section on line ,e s, Fig. l. Fig. 6 isa detail view illustrating our invention in use.

In carrying out our invention we employ a bit-shank A, which may be formed with a head B,having a transverse hole therethrough adapted to receive a handle C, as shown by our drawings. The head B on the upper end of the shank may be formed angular, as indicated by dotted lines C', adapting the tooll to be used with a brace, as will beunderstood. The lower end of the shank A is formed with an enlargement D, having therethrough a substantially squared transverse with interlocking teeth I, which in connec` tion with a clamping-screw J provide positive locking means for the blades, as they may be adj usted for boring the des-i red size bung-hole. The outer faces of the Shanks or arms HH' may be graduated to facilitate proper adjustment of the blades G G. It will be noticed, that the shanks H H are arranged in the opening E from opposite sides of the enlargement D-. e., they lap, with their free ends projecting in opposite directions. In this position of the Shanks H H each blade G G is adapted toV enter its respective socket Fin the Venlargement D and is braced thereby, as will be understood. It will be further noticed that the lower ends of both blades G G have a cutting-lip K, the lip on the blade G being a little the longer,and that their forward lower ends are formed with shaving edges L.

We would call particular attention to our special arrangement of the lips K at the lower ends of the blades G G'. It will be-noticed that the cutting-lip on the blade G is located at one or the inner side of the'blade and that the similar lip on the blade G is located at the outer side thereof. The object of this arrangement of the lips will be understood as adapting them to form two circular concentric cuts L/, one a little larger than the other.

M indicates a bit-point or wood-screw extended downwardly from the enlargement D, as shown. The object of the screw M is to provide feeding means adapted to draw down and'force the lips K into cutting action, and with the shaving edges L, adapted to plow up the wood between the two circular cuts L.

Our improved tool has an advantage over all similar tools known to' us Ain that a bungholev may be bored without liability of shavings getting into the barrel. We have hereinbefore stated that the cutting-lip on one ledge or shoulder N is left on the plug. The

shoulder thus left will eifectively prevent shavings dropping into the barrel when the plug is lifted.

IOO

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

l. The hereinbefore-described bung-holeboring tool consisting of a shank having at its lower end, a feeding-screw and adjustable blades, the latter having at their lower ends shaving edges and cutting-lips, the said lips beingr arranged to make concentric cuts, and one lip formed the longer and adapted to travel in the outer circle, substantially as described.

y2. kA bung-hole-borer tool consisting of a shank having an opening transversely through its lower end, blades with horizontally-disposed Shanks, which when arranged together conform tothe said opening through the lower end of the shank, meshing teeth on the contiguous sides of the said horizontally# disposed shanks, a clamping-screw serving to hold the said teeth, on the horizontally-dis- 

